A cryptocurrency exchange faces a uniquely difficult fraud problem. A hacker who steals my credentials can initiate a transfer of all my bitcoin to another wallet, and it is a non-reversible, non-identifiable payment. So it is really important to prevent those kinds of fraudulent transactions. At the third Software Engineering Daily Meetup, Coinbase director of data science Soups Ranjan explained how Coinbase stays ahead of fraudsters, and he describes some